Liquid Bridge Stereolithography: A Proof of Concept
Stereolithography (SL) is an additive manufacturing (AM) process that uses photopolymers for creating a 3D structure that has excellent surface roughness and allows precision fabrication. Nevertheless, the photopolymer used in this process is generally costly, in particular for medical-grade materials, and a relatively large amount of a photopolymer is required within vat that is necessary for this process. To overcome these disadvantages, a liquid bridge of a photopolymer formed between two plates has been suggested as an alternative to using a vat; a liquid bridge requires less photopolymer, resulting in cost savings. The proposed manufacturing platform utilizes Digital Light Processing (DLP) technology and the constrained surface method. Stacking directions using the suggested liquid bridge method have been investigated to evaluate the stability of the process, in which a liquid bridge of a photopolymer is formed between two substrates and a 3D structure is built within the liquid bridge. Finally, several manufacturing examples are introduced to prove the concept of liquid bridge SL and verify its advantage of material savings.
KeywordsStereolithography Liquid bridge Surface tension Constrained surface Digital light processing
Unable to display preview. Download preview PDF.
- 2.Zhou, C., Chen, Y., and Waltz, R. A., “Optimized Mask Image Projection for Solid Freeform Fabrication,” Journal of Manufacturing Science and Engineering, Vol. 131, No. 6, Paper No. 061004, 2009.Google Scholar
- 6.Dias, A. D., Unser, A. M., Kruger, U., Xie, Y., and Corr, D. T., “Laser Direct-Write Patterning Influences Early Embryonic Stem Cell Differentiation,” Proc. of 41st Annual Northeast Biomedical Engineering Conference (NEBEC), pp. 1–2, 2015.Google Scholar
- 9.Lavini, F., Yang, N., Vasudevan, R. K., Strelcov, E., Jesse, S., et al., “Bias Assisted Scanning Probe Microscopy Direct Write Lithography Enables Local Oxygen Enrichment of Lanthanum Cuprates Thin Films,” Nanotechnology, Vol. 26, No. 32, Paper No. 325302, 2015.Google Scholar
- 13.Yoon, H.-S., Lee, J.-Y., Kim, H.-S., Kim, M.-S., Kim, E.-S., et al., “A Comparison of Energy Consumption in Bulk Forming, Subtractive, and Additive Processes: Review and Case Study,” International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 1, No. 3, pp. 261–279, 2014.CrossRefGoogle Scholar
- 16.Liu, Z., Pan, C., Lin, L., Huang, J., and Ou, Z., “Direct-Write PVDF Nonwoven Fiber Fabric Energy Harvesters via the Hollow Cylindrical Near-Field Electrospinning Process,” Smart Materials and Structures, Vol. 23, No. 2, Paper No. 025003, 2013.Google Scholar
- 21.Laplace, P. S., “Theory of Capillary Attraction,” Supplements to the 10th book of Celestial Mechanics, 1807.Google Scholar
- 27.Lu, Y., Lee, J., Kashyap, S., Emon, M. O. F., and Choi, J.-W., “Development and Characterizations of Liquid Bridge Based Microstereolithography (LBMSL) System,” Proc. of 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing, Paper No. MSEC2017-2731, 2017.Google Scholar
- 28.Lu, Y., “A Study on Liquid Bridge Based Microstereolithography (LBMSL) System,” Ph.D. Thesis, University of Akron, 2016.Google Scholar
- 33.Esmaeilpour, M., Niroumand, B., Monshi, A., Ramezanzadeh, B., and Salahi, E., “The Role of Surface Energy Reducing Agent in the Formation of Self-Induced Nanoscale Surface Features and Wetting Behavior of Polyurethane Coatings,” Progress in Organic Coatings, Vol. 90, pp. 317–323, 2016.CrossRefGoogle Scholar